Fix Logical operator (#2143)

### What problem does this PR solve?

#2120 

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

agent/component/switch.py

         self.check_empty(self.conditions, "[Switch] conditions")
         for cond in self.conditions:
             if not cond["to"]: raise ValueError(f"[Switch] 'To' can not be empty!")
-            if cond["logical_operator"] not in ["and", "or"] and len(cond["items"]) > 1:
-                raise ValueError(f"[Switch] Please set logical_operator correctly!")
 
 
 class Switch(ComponentBase, ABC):